ForeignKeyAttribute.cs

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using System;

using Deveel.Data.Sql;
using Deveel.Data.Sql.Tables;

namespace Deveel.Data.Mapping {
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Field | AttributeTargets.Property)]
    public sealed class ForeignKeyAttribute : Attribute, INamedConstraint {
        // constructors for class attributes...
        public ForeignKeyAttribute(string name, Type referencedType, ForeignKeyAction onUpdate, ForeignKeyAction onDelete) {
            ConstraintName = name;
            ReferencedType = referencedType;
            OnUpdate = onUpdate;
            OnDelete = onDelete;
        }

        public ForeignKeyAttribute(Type referencedType, ForeignKeyAction onUpdate, ForeignKeyAction onDelete)
            : this(null, referencedType, onUpdate, onDelete) {
        }

        public ForeignKeyAttribute(string name, Type referencedType)
            : this(name, referencedType, ForeignKeyAction.Cascade, ForeignKeyAction.Cascade) {
        }

        public ForeignKeyAttribute(Type referencedType)
            : this(null, referencedType) {
        }

        // constructors for fields and properties...
        public ForeignKeyAttribute(Type referencedType, string referencedMember) {
            ReferencedType = referencedType;
            ReferencedMember = referencedMember;
        }

        public ForeignKeyAttribute(string name, string referencedMember) {
            ConstraintName = name;
            ReferencedMember = referencedMember;
        }

        public string ConstraintName { get; set; }

        public Type ReferencedType { get; private set; }

        public string ReferencedMember { get; private set; }

        public ForeignKeyAction OnUpdate { get; set; }

        public ForeignKeyAction OnDelete { get; set; }
    }
}